1,721,300 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Effects of sertindole on sleep-wake states, electroencephalogram, behavioral patterns, and epileptic activity of rats
Full text linkContains fulltext :
29052.pdf (Publisher’s version ) (Open Access)In this study we addressed the effects of the 5-HT2 receptor antagonist sertindole in rats. The compound was administered in doses of 0.08, 0.32, and 1.28 mg/kg, whereas a control group received the solvent. The effects of sertindole on sleep-wake states, behavioral patterns, and background electroencephalogram were studied. Following injection of drug or solvent, we recorded the electroencephalogram and electromyogram for two periods of 4 h in the dark period of the light-dark cycle on 2 successive days. On the 1st day sertindole induced a significant increase in deep slow-wave sleep, but only with a dose of 0.32 mg/kg. Furthermore, a decrease in REM sleep in all three drug groups was established. The suppression of REM sleep was still present on the 2nd day. Sertindole also induced a decrease in alternation between behavioral patterns on the 1st day. There were no significant changes in the spectral content of the background electroencephalogram. In a parallel experiment it appeared that sertindole had no main effects on epileptic spike-wave discharges. This was established with a dose of 1.28 mg/kg sertindole in rats with absence seizures. These findings suggest that sertindole, similar to other compounds modulating 5-HT2 receptors, influences sleep-wake states in rats by decreasing REM sleep and mildly increasing deep slow-wave sleep, whereas behavioral variation is slightly diminished, with no effects on the background EEG and almost no effects on spike-wave discharges
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Het effect van de toepassing van een pleisterlaag voorgeschreven door de norm EN 29052-1 voor dynamische stijfheidsmetingen
No full textDe schijnbare dynamische stijfheid is een belangrijke eigenschap van elastische materialen gebruikt onder zwevende dekvloeren, zodat schatting van de verbetering in contactgeluidisolatie, 'L, mogelijk wordt. Het WTCB onderzoekt de nauwkeurigheid van de schijnbare dynamische stijfheidsmetingen beschreven in de norm EN 29052-1. Uit voorgaande resultaten blijkt de pleisterlaag, aangebracht op de proefstukken, een invloed te hebben op de metingen. Als gevolg onderzoekt deze masterproef de invloed van de pleisterlaag op de dynamische stijfheid.
Zes monsters, drie met een open en drie met een gesloten celstructuur, en drie verschillende soorten pleisters worden getest volgens de norm EN 29052-1. Het materiaal en de pleister worden zowel afzonderlijk als in combinatie met elkaar getest. Bijgevolg test het onderzoek de invloed van kruip van het materiaal alsook het effect van de droogtijd van de pleisterlaag.
Het onderzoek toont aan dat kruip bij monsters met een open celstructuur beperkt is in vergelijking met monsters met een gesloten celstructuur. Volgende effecten hebben een invloed op de dynamische stijfheid; de som van de soepelheden van het materiaal en de pleisterlaag bepaalt de evolutie in tijd van de dynamische stijfheid van het geheel (1), hoe groter het contactoppervlak, hoe meer ingesloten lucht (effecten van de pleisterlaag), hoe groter de dynamische stijfheid (2), een kleiner verschil in dynamische stijfheid tussen het materiaal en de pleisterlaag leidt tot een langere beïnvloedingsduur van de pleisterlaag (3)
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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